Level 34

Total Experience Required 186,516 [confirmed]

Level 100 progress: 2.73%

This is roughly:
Killing 622 people in Warzone, or...
Killing 635 people in Execution, or...
Killing 527 people in Wingman, or...
Scoring 133,226 points in Guardian, or...
Scoring 405,470 points in Annex, or...
Scoring 245,416 points in Submission.

Horde (TU4)

Completing 933 waves on Casual, or...
Completing 622 waves on Normal, or...
Completing 467 waves on Hardcore, or...
Completing 374 waves on Insane.

Or a combination of the above. Have fun!